Even with millennials (1981 to 1996) there is a big difference when you where born.
If you are an early millennial you grew up with MS-DOS, so you had to learn the terminal to get anything done. You probably had your first smartphone after you where 25.
If you are a late millennial you grew up with Windows XP and probably had a smartphone as a teen.
There was a time before Windows where a lot of people used MS-DOS and it was all terminal. Maybe computers where less popular back in those days because of the learning curve, but still many people used a PC with just the terminal.